Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 180948
SWOMCD
SPC MCD 180948
INZ000-KYZ000-ILZ000-MOZ000-181145-

Mesoscale Discussion 1081
NWS Storm Prediction Center Norman OK
0448 AM CDT Sun Jun 18 2017

Areas affected...Far southern IL...parts of southern IN...and
western and northwestern KY

Concerning...Severe Thunderstorm Watch 350...

Valid 180948Z - 181145Z

The severe weather threat for Severe Thunderstorm Watch 350
continues.

SUMMARY...Greatest severe-weather threat (primarily with damaging
winds) will continue to spread across southwest into south-central
IN and parts of western and northwestern KY early this morning.  The
overall severe-weather threat should continue to diminish across far
southern IL.

DISCUSSION...Trends in lightning data and fast storm movement
(east-southeast at 40-45 kt) with storms that have moved into
southwest IN suggest a continued severe-weather threat across this
portion of WW 350 through 10-12Z.  If forward motion is maintained
through 1030-11Z, portions of northwest KY (Breckinridge and Meade
Counties) to Harrison County IN may need to be added to this watch.
The ongoing storms in southwest IN are moving through the axis of
strongest instability, while most-unstable CAPE weakens with
eastward extent into central KY.  This observation and potential for
further boundary layer stabilization early this morning could
eventually limit the severe-weather threat east of WW 350.

Meanwhile, the decrease in storm movement and diminishing lightning
trends across southern IL suggests the overall severe-weather threat
in this portion of WW 350 should continue to wane.

..Peters.. 06/18/2017

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...LMK...IND...PAH...ILX...

LAT...LON   36918800 36898904 37068925 37308939 37528919 37498863
            38148795 38668756 39248747 39118547 38438566 37838612
            37628629 37268691 36918800




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